The Companion Animal Parasite Council (CAPC),  the nation's leading source on parasitic diseases that threaten the health of pets and people, has ranked Chattanooga among the top ten cities that have the highest percentage increase in positive heartworm tests for pets. 

The results released Monday show positive heartworm test results from the last 30 to 45 days. Heartworm disease which is transmitted by mosquitoes is a national threat to pets who are increasingly vulnerable to this debilitating and potentially fatal illness. It takes just one heartworm-infected dog in an area to become a reservoir of infection, increasing the number of infected mosquitoes and ultimately spreading the heartworm parasite to unprotected dogs and cats.

During August 2019, these 10 U.S. cities had the highest percentage increase in positive heartworm tests:

  • Moreno Valley, California
  • Washington, DC
  • Newark, New Jersey
  • Indianapolis, Indiana
  • Cheyenne, Wyoming
  • Tallahassee, Florida
  • Chattanooga, Tennessee
  • New Orleans, Louisiana
  • Sterling Heights, Michigan
  • Fort Wayne, Indiana